<!DOCTYPE html>
<html lang="zh-CN">
	<head>
		<meta charset="UTF-8" />
		<meta name="author" content="wangbo" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>参数的作用域</title>
	</head>
	<body>
		
<script>
	let add1 = function (a,b) {
		let c = a+b
		return c
	}

	// 结果一样,说明,return 后边是表达式, 需要先执行完表达式
	let add2 = function (a,b) {
		return a+b
	}
</script>
	</body>
</html>
